Anterior gradient 2 is correlated with EGFR mutation in lung adenocarcinoma tissues

Sodai Narumi, Yasuhiro Miki, Shuko Hata, Masahito Ebina, Mikiyoshi Saito, Kazushige Mori, Makoto Kobayashi, Takashi Suzuki, Erina Iwabuchi, Ikuro Sato, Makoto Maemondo, Chiaki Endo, Akira Inoue, Takashi Kondo, Hisafumi Yamada-Okabe, Masakazu Ichinose, Hironobu Sasano

研究成果: Article査読

3 被引用数 (Scopus)

抄録

Background: Epidermal growth factor receptor (EGFR)–tyrosine kinase inhibitor (TKI) has demonstrated a promising therapeutic response in lung adenocarcinoma patients with EGFR gene mutations. However, the predictive factors for this therapy have not been established, except for the EGFR gene mutation status of carcinoma cells. Methods: We first performed microarray analysis in EGFR-TKI–sensitive lung adenocarcinoma cell lines. The results indicated anterior gradient 2 (AGR2) as a potential surrogate marker of EGFR-TKI. Therefore, we then evaluated the correlation between the status of AGR2 immunoreactivity and clinicopathological factors including overall survival (OS), progression-free survival (PFS) and clinical response to EGFR-TKI, in 147 cases of surgically resected lung adenocarcinoma. The biological significance of AGR2 was further evaluated by transfecting small interfering RNA (siRNA) against AGR2 in these cells. Results: The status of AGR2 immunoreactivity was significantly higher in lung adenocarcinoma cases with EGFR gene mutations than in those with the wild type (p<0.0001), but there were no significant differences in OS, PFS and response of EGFR-TKI between the AGR2 high and low carcinoma cases. Knockdown of AGR2 gene expression following siRNA transfection resulted in a significantly lower response to EGFR-TKI in EGFR-mutated PC-3. Conclusions: AGR2 could serve as an adjunctive surrogate protein marker possibly reflecting EGFR gene mutations in lung adenocarcinoma patients. Results from in vitro analysis indicated that AGR2 could be a potential clinical biomarker of EGFR-TKI therapeutic sensitivity in lung adenocarcinoma cells.

本文言語English
ページ(範囲)e234-e242
ジャーナルInternational Journal of Biological Markers
30
2
DOI
出版ステータスPublished - 2015 4 1

ASJC Scopus subject areas

  • 病理学および法医学
  • 腫瘍学
  • 臨床生化学
  • 癌研究

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